How to paint plastic?

Plastics are of different types, and each of these materials has unique properties, and accordingly it is necessary to paint such surfaces differently. There are plastics that can not paintable.

If a plastic such as polypropylene or polyethylene (PE), then it is virtually impossible to paint any paint will slazit pieces from it. That is, if you want, for example, paint the metal and plastic pipes in the house (they are made from polyethylene), it did not work, so it is better to choose the right shade.
When it comes to plastic automotive parts, they are divided into two types, requiring the application of a special primer is not required. To determine which group a specific plastic part is pretty simple: You can omit the product or a small piece of the water if it is completely gone under water, the item does not need to be primed, if floating on the water surface, it is necessary to applying a special primer for plastic. You can also burn a piece of plastic parts, free of paint and dirt – if it burns with black smoke and soot, then apply the primer is not necessary, if the flame is clean and smooth, the priming is necessary.
Technology coloring plastics
In general, the sequence of operations for dyeing plastic surfaces and parts as follows:

Degreasing
The application of a primer for plastic surfaces
The application of acrylic-based primer
Grinding acrylic primer
The application of paint
Features painting plastic

Plastics based on ABS or PVC lend themselves to color, but the first such surfaces should be coated with an adhesive primer. It can be purchased in the automobile (primer for plastics) or paint shops – a primer of the type “Oteks” from the company Tikkurila. Such compositions are applied by spraying or wiping and thereafter poverhngosti must dry for one minute.
Plastic surfaces for painting should be dry and clean, they are free of grease, dust or other contaminants.
Additionally, there is no need to prepare the surface for painting, only if the work is carried out with polystyrene or ABS plastic, which will be painted with acrylic paints water.
The temperature of the plastic, paint and even painting equipment must be the same. Ideal for painting plastics considered conditions in the room with a temperature of not less than 18 degrees and the humidity is not more than 80%.
Dyeing is carried out in a single layer with a thickness of about 60 microns. The layer thickness may be less fragile, and the paint is bad to stay on the surface of the plastic. Conversely, too thick a layer of paint (120 microns) leads to an increase in drying time, and it can badly affect the appearance of the paint.
Drying of plastic surfaces after painting must be done at temperature 18-60 degrees, the exact value depends on the thickness of the paint layer. Thus, when a layer 90-120 microns ink drying time is approximately 3 hours at a temperature of 50 degrees and a humidity of 65%. Polyamides and polypropylenes can be dried for 20 minutes at a temperature of 100 degrees Celsius.
Complete drying (curing) of paint on the plastics occurs at 5-7 hours, but if the temperature is low, the humidity is high, and very thick layer of paint, this period can be elongated by several times.